Slate-picker



(No Model.) 7

E. A. BARTL & J. O. BOWMAN.

SLATE PIGKBR.

No. 454,393. Patented June 16,1891.

NITE STATES PATENT OFFICE.

EDMUND A. BARTL AND JACOB O. BOIVMAN, OF SCRANTON, PENNSYLVANIA.

SLATE-PICKER.

SPECIFICATION forming part Of Letters Patent NO. 454,393, dated June 16,1891. Application filed Pehruarylt'i, I891. $erial No. 381,603. (Nomodel.)

To aZZ whom it may concern:

Be it known that we, EDMUND A. BARTL and Moon 0. BOWMAN, both residentsof Scranton, in the county of Lackawanna and State of Pennsylvania, haveinvented certain new and useful Improvements in Slate-Pickers; and we dohereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, which form a part of this specification.

Our invention relates to improvements in slate-pickers for freeing coalfrom slate.

As is Well understood, coal as it comes from the mines is subjected tothe action of breakers, which crush and break the same into lumps ofapproximately the same size. The coal is then fed over inclined ways,along the sides of which are stationed operators who pick out the slatewhich is generally found intermingled with the coal. This is a veryinefficient manner or method of freeing the coal of slate, a smallpercentage of the latter only being removed.

Our invention is designed to provide an improved construction of pickerwhereby the slate can be readily removed automatically or with butlittle outside assistance.

The invention consists in the novel construction and combination ofparts hereinafter fully described, and specifically defined in theclaim.

In the accompanying drawings, Figure 1 is a plan view of a slate-pickerconstructed in accordance with our invention. Fig. 2 is a sectional viewof the same; Fig. 3, a longitudinal section.

In thesaiddrawii igs, the reference-nuxnerals l and 2 designate top andbottom transverse bars, respectively, to the upper of which are.

secured angle-bars 3. At their bottoms these bars 3 are secured to studs4, attached to the transverse bar 2, so that at these ends they aresomewhat farther from the bar 2 than at the other or upper ends. Thesebars may be made of cast or wrought iron or any other material foundconvenient. As seen, the bars are separated from. each other, formingspaces 5 therebetween.

Secured to the underside of the bars 1 and 2 are a series of bars 6,preferably round or cylindrical, which are located under and in linewith the spaces between the angular bars.

The operation is as follows: The coal as it comes from the breaker is inirregularlyshaped lumps, which are approximately of the same size. Theslate which is intermingled therewith, however, generally consists offiat slabs or pieces. The spaces between the angle-bars are somewhatsmaller than the lumps of coal which are to be screened, so that whilethe slate will pass through the same edgewise the coal will pass overand be delivered at the bottom thereof. The device is set in an inclinedposition, so that the coal will pass down by gravity, and the slatefalling through the spaces will strike the bars underneath and bediverted to the right or left toward the sides thereof, and thuspreventing the same from accumulating in the center and clogging thedevice. They also serve to strengthen and brace the picker.

It will be understood that the width of the spaces between theangle-bars will correspond with the size of the coal fed to the device.

The upper ends of the angle-bars are nearer to the transverse bars thanthe opposite ends in order to free the slate from between the bars andsides of the angle-bars.

Having thus described our invention,what We claim is The combination ofthe transverse bars, the angle-bars secured thereto wit-h spaces betweenthe same, said angle-bars at their upper ends being nearer to thetransverse bars than at their lower ends, and the bars secured to thesaid transverse bars and located under and in line with said spaces,substantially as described.

In testimony that we claim the foregoing as our own we have hereuntoaffixed our signatures in presence of two witnesses.

EDMUND A. BARTL. JACOB l:lO\VMAN.

Witnesses:

SNocoLD OLSZEWSKIT, FRANK NICHTER.

